NL71172C - - Google Patents
Info
- Publication number
- NL71172C NL71172C NL71172DA NL71172C NL 71172 C NL71172 C NL 71172C NL 71172D A NL71172D A NL 71172DA NL 71172 C NL71172 C NL 71172C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US704483A US2566849A (en) | 1946-10-19 | 1946-10-19 | Electroacoustic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL71172C true NL71172C (fr) |
Family
ID=24829716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL71172D NL71172C (fr) | 1946-10-19 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2566849A (fr) |
| BE (1) | BE473856A (fr) |
| FR (1) | FR946542A (fr) |
| GB (1) | GB646164A (fr) |
| NL (1) | NL71172C (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5245892A (en) * | 1975-10-09 | 1977-04-11 | Seikosha Co Ltd | Sound genertor equipment |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1455745A (en) * | 1919-05-09 | 1923-05-15 | Henry C Egerton | Diaphragm for dictaphones, etc |
| US1331469A (en) * | 1919-06-25 | 1920-02-17 | Stewart Gatter L | Telephone-receiver |
| US1708943A (en) * | 1921-09-22 | 1929-04-16 | Western Electric Co | Acoustic device |
| US1439785A (en) * | 1922-04-20 | 1922-12-26 | Eisemann Magneto Corp | Telephone receiver of the watchcase type |
| US1830160A (en) * | 1928-03-19 | 1931-11-03 | French Electric Company | Telephone receiver |
| US1800573A (en) * | 1929-01-12 | 1931-04-14 | Skala Res Lab Inc | Diaphragm |
| USRE22499E (en) * | 1932-12-24 | 1944-06-20 | Bone conduction heabing-aid | |
| US2003908A (en) * | 1934-04-25 | 1935-06-04 | Bell Telephone Labor Inc | Acoustic device |
| US2044608A (en) * | 1935-05-03 | 1936-06-16 | Du Pont Viscoloid Co | Diaphragm for electrical reproduction of sound |
| US2170571A (en) * | 1936-08-12 | 1939-08-22 | Bell Telephone Labor Inc | Acoustic device |
| US2141595A (en) * | 1937-01-13 | 1938-12-27 | Cinaudagraph Corp | Magnet structure |
| US2249160A (en) * | 1939-05-19 | 1941-07-15 | Bell Telephone Labor Inc | Acoustic device |
| BE479953A (fr) * | 1940-11-29 | |||
| US2395166A (en) * | 1942-12-24 | 1946-02-19 | Astatic Corp | Transducer |
| US2404727A (en) * | 1944-12-14 | 1946-07-23 | Du Pont | Dissolving of polymers |
-
0
- BE BE473856D patent/BE473856A/xx unknown
- NL NL71172D patent/NL71172C/xx active
-
1946
- 1946-10-19 US US704483A patent/US2566849A/en not_active Expired - Lifetime
-
1947
- 1947-05-12 FR FR946542D patent/FR946542A/fr not_active Expired
- 1947-10-16 GB GB27761/47A patent/GB646164A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE473856A (fr) | |
| FR946542A (fr) | 1949-06-07 |
| GB646164A (en) | 1950-11-15 |
| US2566849A (en) | 1951-09-04 |